this post was submitted on 05 Mar 2025
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Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular Spying (www.eff.org)
submitted 3 days ago by pelespirit to c/[email protected]
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To fill these gaps in our knowledge, we have created an open source project called Rayhunter.1 It is developed to run on an Orbic mobile hotspot (Amazon, Ebay) which is available for $20 or less at the time of this writing. We have tried to make Rayhunter as easy as possible to install and use, regardless of your level of technical knowledge. We hope that activists, journalists, and others will run these devices all over the world and help us collect data about the usage and capabilities of cell-site simulators (please see our legal disclaimer.)

Rayhunter works by intercepting, storing, and analyzing the control traffic (but not user traffic, such as web requests) between the mobile hotspot Rayhunter runs on and the cell tower to which it’s connected. Rayhunter analyzes the traffic in real-time and looks for suspicious events, which could include unusual requests like the base station (cell tower) trying to downgrade your connection to 2G which is vulnerable to further attacks, or the base station requesting your IMSI under suspicious circumstances.

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[–] [email protected] 3 points 3 days ago

For $10 and a chance to help the EFF? Done.